Engine Running Rich?
Thread Starter
Heel & Toe
Joined: May 2005
Posts: 22
Likes: 0
Engine Running Rich?
When my 93 Corvette idles white smoke come out of the exhaust .Also the exhaust fumes are strong.Does this mean the engine is running rich?I do not get any codes.Just replaced spark plugs.What do I check next?
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,215
From: Park City Utah
White smoke is steam. Or more accurately, it was steam and it's condensed into vapor that you can see. Anyway, it's either b/c your car is cold and the air is cold (combustion makes steam/water)...or you're getting coolant into your combustion chamber(s)...likely a blown head gasket. Are you losing coolant?
Rich mixture causes black smoke. You need to get/find/borrow a scan tool and have someone look at your O2 sensor performance. You may simply need new O2 sensor(s).
.
Rich mixture causes black smoke. You need to get/find/borrow a scan tool and have someone look at your O2 sensor performance. You may simply need new O2 sensor(s).
.
Last edited by Tom400CFI; Jan 6, 2018 at 04:21 PM.
Thread Starter
Heel & Toe
Joined: May 2005
Posts: 22
Likes: 0
White smoke is steam. Or more accurately, it was steam and it's condensed into vapor that you can see. Anyway, it's either b/c your car is cold and the air is cold (combustion makes steam/water)...or you're getting coolant into your combustion chamber(s)...likely a blown head gasket. Are you losing coolant?
Rich mixture causes black smoke. You need to get/find/borrow a scan tool and have someone look at your O2 sensor performance. You may simply need new O2 sensor(s).
.
Rich mixture causes black smoke. You need to get/find/borrow a scan tool and have someone look at your O2 sensor performance. You may simply need new O2 sensor(s).
.
Le Mans Master
Joined: Jan 2006
Posts: 5,620
Likes: 206
From: Orlando FL
White smoke is steam. Or more accurately, it was steam and it's condensed into vapor that you can see. Anyway, it's either b/c your car is cold and the air is cold (combustion makes steam/water)...or you're getting coolant into your combustion chamber(s)...likely a blown head gasket. Are you losing coolant?
Rich mixture causes black smoke. You need to get/find/borrow a scan tool and have someone look at your O2 sensor performance. You may simply need new O2 sensor(s).
Rich mixture causes black smoke. You need to get/find/borrow a scan tool and have someone look at your O2 sensor performance. You may simply need new O2 sensor(s).
As said, get a scan tool for OBD1 and look at the fuel trim numbers.
